feat(cloud_firestore_odm): Add support for DateTime/Timestamp

packages/cloud_firestore_odm/cloud_firestore_odm/example/.metadata

@@ -1,10 +1,42 @@
 # This file tracks properties of this Flutter project.
 # Used by Flutter tool to assess capabilities and perform upgrades etc.
 #
-# This file should be version controlled and should not be manually edited.
+# This file should be version controlled.
 
 version:
-  revision: 18116933e77adc82f80866c928266a5b4f1ed645
-  channel: stable
+  revision: 8662e22bac54c71bc4fa5a4f37e9ee80bfd08a4e
+  channel: dev
 
 project_type: app
+
+# Tracks metadata for the flutter migrate command
+migration:
+  platforms:
+    - platform: root
+      create_revision: 8662e22bac54c71bc4fa5a4f37e9ee80bfd08a4e
+      base_revision: 8662e22bac54c71bc4fa5a4f37e9ee80bfd08a4e
+    - platform: android
+      create_revision: 8662e22bac54c71bc4fa5a4f37e9ee80bfd08a4e
+      base_revision: 8662e22bac54c71bc4fa5a4f37e9ee80bfd08a4e
+    - platform: ios
+      create_revision: 8662e22bac54c71bc4fa5a4f37e9ee80bfd08a4e
+      base_revision: 8662e22bac54c71bc4fa5a4f37e9ee80bfd08a4e
+    - platform: macos
+      create_revision: 8662e22bac54c71bc4fa5a4f37e9ee80bfd08a4e
+      base_revision: 8662e22bac54c71bc4fa5a4f37e9ee80bfd08a4e
+    - platform: web
+      create_revision: 8662e22bac54c71bc4fa5a4f37e9ee80bfd08a4e
+      base_revision: 8662e22bac54c71bc4fa5a4f37e9ee80bfd08a4e
+    - platform: windows
+      create_revision: 8662e22bac54c71bc4fa5a4f37e9ee80bfd08a4e
+      base_revision: 8662e22bac54c71bc4fa5a4f37e9ee80bfd08a4e
+
+  # User provided section
+
+  # List of Local paths (relative to this file) that should be
+  # ignored by the migrate tool.
+  #
+  # Files that are not part of the templates will be ignored by default.
+  unmanaged_files:
+    - 'lib/main.dart'
+    - 'ios/Runner.xcodeproj/project.pbxproj'

packages/cloud_firestore_odm/cloud_firestore_odm/example/build.yaml

@@ -1,6 +1,25 @@
 targets:
   $default:
     builders:
+      cloud_firestore_odm_generator:
+        enabled: true
+        generate_for:
+          include:
+            - lib/*
+            - lib/**
+            - test_driver/integration/*
+            - test_driver/integration/**/*
       json_serializable:
+        enabled: true
+        generate_for:
+          include:
+            - lib/*
+            - lib/**
+            - test_driver/integration/*
+            - test_driver/integration/**/*
         options:
-          create_field_map: true
+          create_field_map: true
+      source_gen|combining_builder:
+        options:
+          ignore_for_file:
+            - 'type=lint'

packages/cloud_firestore_odm/cloud_firestore_odm/example/lib/integration/query.dart

@@ -0,0 +1,55 @@
+import 'package:cloud_firestore/cloud_firestore.dart';
+import 'package:cloud_firestore_odm/cloud_firestore_odm.dart';
+import 'package:json_annotation/json_annotation.dart';
+
+part 'query.g.dart';
+
+@Collection<DateTimeQuery>('firestore-example-app/42/date-time')
+final dateTimeQueryRef = DateTimeQueryCollectionReference();
+
+@JsonSerializable()
+@FirestoreDateTimeConverter()
+class DateTimeQuery {
+  DateTimeQuery(this.time);
+  final DateTime time;
+}
+
+class FirestoreDateTimeConverter extends JsonConverter<DateTime, Timestamp> {
+  const FirestoreDateTimeConverter();
+  @override
+  DateTime fromJson(Timestamp json) => json.toDate();
+
+  @override
+  Timestamp toJson(DateTime object) => Timestamp.fromDate(object);
+}
+
+@Collection<TimestampQuery>('firestore-example-app/42/timestamp-time')
+final timestampQueryRef = TimestampQueryCollectionReference();
+
+@JsonSerializable()
+@FirestoreTimestampConverter()
+class TimestampQuery {
+  TimestampQuery(this.time);
+  final Timestamp time;
+}
+
+@Collection<GeoPointQuery>('firestore-example-app/42/geopoint-time')
+final geoPointQueryRef = GeoPointQueryCollectionReference();
+
+@JsonSerializable()
+@FirestoreGeoPointConverter()
+class GeoPointQuery {
+  GeoPointQuery(this.point);
+  final GeoPoint point;
+}
+
+@Collection<DocumentReferenceQuery>('firestore-example-app/42/doc-ref')
+final documentReferenceRef = DocumentReferenceQueryCollectionReference();
+
+@JsonSerializable()
+@FirestoreDocumentReferenceConverter()
+class DocumentReferenceQuery {
+  DocumentReferenceQuery(this.ref);
+
+  final DocumentReference<Map<String, dynamic>> ref;
+}